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Source code for galaxy.model.migrate.versions.0176_add_indexes_on_update_time
"""
Migration script to add indexes on update_time columns that are frequently used in ORDER BY clauses.
"""
import logging
from sqlalchemy import MetaData
from galaxy.model.migrate.versions.util import (
add_index,
drop_index
)
log = logging.getLogger(__name__)
metadata = MetaData()
indexes = [
[
"ix_history_dataset_association_update_time",
"history_dataset_association",
"update_time"
],
[
"ix_library_dataset_dataset_association_update_time",
"library_dataset_dataset_association",
"update_time"
],
[
"ix_job_update_time",
"job",
"update_time"
],
[
"ix_history_dataset_collection_association_update_time",
"history_dataset_collection_association",
"update_time"
],
[
"ix_workflow_invocation_update_time",
"workflow_invocation",
"update_time"
],
[
"ix_stored_workflow_update_time",
"stored_workflow",
"update_time"
],
]
[docs]def upgrade(migrate_engine):
print(__doc__)
metadata.bind = migrate_engine
metadata.reflect()
for ix, table, col in indexes:
add_index(ix, table, col, metadata)
[docs]def downgrade(migrate_engine):
metadata.bind = migrate_engine
metadata.reflect()
for ix, table, col in indexes:
drop_index(ix, table, col, metadata)